<html>
 <body>
  <a href="http://sudopedia.enjoysudoku.com/Nice_Loop.html">Bidirectional Cycle</a>
  <p>
   There are two possibilities to place the highlighted digits into the <b>cells {0}</b>.<br/>
   Certain rows, columns and/or blocks will contain one of the values regardless of which way the digits are placed.<br/>
   Other occurences of the digits in the same rows, columns or blocks can therefore be removed.<br/>
  </p>
  <p>
   This so-called Bidirectional Cycle consists of two complementary, circular chains of implications.<br/>
   Bidirectional Cycles are also known as <a href="http://sudopedia.enjoysudoku.com/Double_Implication_Chain.html">Double Implication Chain</a>).<br/>
  </p>
  <p>
  <b>Details of the Cycle, forward direction (View 1):</b><br>
  {3}
  </p>
  <p>
  <b>Details of the Cycle, reverse direction (View 2):</b><br>
  {4}
  </p>
 </body>
</html>